Woven wire fabrics



Feb; 8,

F. STEINHART WOVEN WIRE FABRICS Filed Aug. 22, 1936 2 Sheets-Sheet 1 INVENTOR Ferd/hand Sfe/nhan ATTORNEY Feb. 8, 1938. F. STEINHART WOVEN WIRE FABRICS Filed Aug. 22, 1936 2 Sheets-Sheet 2 ATTORNEY Patent'ed F eb. 8, 1938 PATENT OFFICE WOVEN WIRE FABRICS Ferdinand Steinhart, Kearny, N. J., assignor to The Lindsay Wire Weaving Company, Cleveland, Ohio, a. corporation of Ohio ApplicationAugust 22, 1936, Serial No. 97,353 In Great Britain August 28, 1935 11 Claims. (o1. 245-10) This invention relates to woven wire fabrics and more particularly to a means for uniting together sections of such fabric so as to provide endlesswire cloths for Fourdrinier paper making machinesQ The present invention has particular reference to wire fabrics woven'with a' I twill weave. In a twill weave each weft wire passes alternately under two warp wires and over one warp wire, the intersection of weft with warp wires being advanced by one warp wire at each successive pick.

g The invention contemplates preparing the ends of the twill weave woven wire so they may readunited by welding, brazing or soldering.

The first step comprises removing a plurality of 0 ends is bent where they across the last remaining weft wire.

This results in every third warp wire terminatevery pair of intervening warp wires terminating in upwardly sloping end portions.

jecting warp wire ends of one section united to those of the other section by welding, brazing or soldering in a known manner. The two ends of the fabric may be united so that the twill weave continuous across the seam or, if desired, the ends-may be so abutted that the twill weave is interrupted at the seam.

. The welded joint method is strong and durable-and will invariably outlastfthefabric. .It does not protrude appre- 4ociably beyond either face of the fabric-and the meshes at the joint are of substantially the same size. asthe meshes throughout the fabric. j The seam or joint, therefore, will not mark the paper r Fig. -6 is a longitudinal sectional view showing: the two fabric ends assembled together ready for" th produced by the improved Figs. 7, 8 and 9 illustrate how the different warp wires are abutted together; and

Fig. 10 is a View similar to Fig. 6 showing the position of the fabric ends prior to welding a seam in which the twill weave is continuous across the 5 seam.

.Referring again to the drawings, the weft wires are indicated by the reference characters a, b, c, d, e, f and the warp wires are designated I, 2 and 3. ,1

In the preferred manner of carrying out the invention the first step in the process of preparing the ends of the fabric consists in withdrawand the crests of the corresponding warp wires. The weft wire d is then removed by drawing it obliquely to the plane of the fabric while withdrawing it through the end edge of the fabric, so as to progressively raise the end of every third warp wire. stage in theprocess of preparing the ends of the fabric the warp wire would assume approximately the position indicated in Fig. 2.

wire I crosses the wires 2 and 3.

The ends of the warp wires .l, 2 and 3 are now shortened by shearing them along the planes X X and Y-Y of Fig. 4 with the result the warp wire ends are cut to the form illustrated in Fig.

Referring to Figs. 6,7 and 8, it will be seen that e warp wire 3 terminates in a steep upwardly inclined end portion 3a, the wire 2 in a less steeply the wire I in a downwardly inclined end portion which the continuity of When the two ends of the fabric to be joined have been prepared as above described, they may be abutted together as shown in Figs. 6 to 9, with the warp wire ends la, 2a and 3a of one end of fabric abutted against the corresponding warp wire ends 21), lb and 3b, respectively,'of the other end of fabric. The end portions Ia and Zb, 7,11

and lb, 3a and 3b are then welded together in known manner.

The resulting seam, it will be observed, interrupts the continuity of the twill weave, but if it is desired to maintain the continuity of the twill weave across the seam, the ends of fabric may be abutted together, as shown in Fig. 10, so that warp wire end la abuts against warp wire end 3?), warp wire end 2a against warp wire end 21) and warp wire end 3a against warp wire end lb that is to say, by offsetting one end of fabric with respect to the other end of fabric a distance equal to the pitch of the warp wires.

' In forming the seam illustrated in Fig. 10 in the twill weave is maintained across the scam, the wire ends 211 and 2b are bent up at a somewhat more acute angle and may be trimmed off slightly.

It will, of course, be understood that the drawings show the fabric on a greatly enlarged scale and the illustrations are somewhat exaggerated for the sake of clearness. being assembled in coplanar relationship while welding, the joint obtained in this manner is perfectly flat and need not be subjected to any difficult rolling or flattening treatment liable to widen the joint and cause marking on the paper when the belt is in use.

Such changes in the method or details as would occur to one skilled in the art are to be considered as coming within the spirit of the invention and'the scope of the appended claims.

I claim:

1'. The'improved method of uniting the ends of twill weave woven wire fabric which consists in removing a plurality of weft wires from' the ends of the fabric to be joined, opening out the loose warp wire ends so that every third warp wire end is bent downwardly and every pair of intervening warp wire ends is bent upwardly,

severing the warp wire ends shortly beyond where they cross the last remaining weft wire so as to leave downwardly sloping end portions on every third warp wire and upwardly sloping end portions onthe intervening warp wires, abutting the ends of the fabric with the warp wires of one end of fabric'in line with and abutting the warp wires of the other end of fabric, and finally uniting the abutting warp wire ends. by welding, brazing or soldering.

2; The improved method of uniting the ends of twill weave woven wire fabric which consists in: preparing each end of fabric by withdrawing the first three end weft wires and removing the next remaining end weft wire by drawing it obliquely to the plane of the fabric while withdrawing it through the end edge of the fabric,

so as to progressively raise the end of every third warp wire, thereuopn of every intervening pair of warp; wires so as to raise one warp wire end and depress the other warp wire end of each intervening pair of warp wires, subsequently cutting the warp wire ends to leave :every third warp, wire with a downwardlyslopingv end, portion and; the other Warp, wires Due to the wire ends 'with and abutting the warp separating the warpv ends abutting warp wires ends by welding, brazing or soldering.

3. The improved method of uniting the ends of twill weave woven wire fabric which consists in removing a plurality of weft wires from the ends of thefabric to be joined, opening out'the loose warp wire ends so that every third warp wire end is bent downwardly and every pair of intervening warp wire ends is bent upwardly, shearing across the raised warp wire ends in the plane of the top surface of the fabric and shearingacross the depressed warp wire ends in the plane of the under-surface of the fabric to sever the warp wire ends shortly beyond where they cross the last remaining weft wire and thereby to leave downwardly sloping end portions on every third warp wire and upwardly sloping end portions on the intervening warp wires, the fabric with the warp wires of one end of fabric in line with and abutting the warp wires of the, other end of fabric, and finally uniting the abutting warp wire ends by welding, brazing or soldering.

4. The improved method of uniting the ends of twill weave woven wire fabric which consists in preparing each end of the fabric by withdrawing the first three end weft wires and removing the next remaining end weft wire by withdrawing it obliquely to the plane of the fabric while with drawing it through the end edge of the fabric, so as to progressively raise the end of every third warp wire, thereupon separating the warp ends of every intervening pair of warp wires so as to raise one warp wire end. and depress the other warp wire end of each intervening pair'of warp wires, subsequently shearing across the raised warpwire ends in the plane of the top surface of the fabric and shearing across the depressed warp wire ends in the plane of the undersurface of thefabric to sever the warp wire ends shortly beyond where they cross. the last remaining weft wire end and thereby leaving everythird warp wire with a downwardly sloping end portion and the other warp wires with upwardly sloping end portion, and assembling the ends of fabric so. prepared by abutting them with the warp wires of one end of fabric in line wires of the other end of fabric, and finally uniting the abutting warp wire ends by welding, brazing or soldering.

5; The improved method of uniting the ends of twill weave woven wire fabricwhich consists in preparing each end of fabric by withdrawing the abutting the ends of.

first three end weft wires and removing the next remaining'end weft wire by drawing it obliquely to the plane of the fabric while withdrawing it through the end edge of the fabric, so'as to progressively raise the end ofjevery third warp wire, thereupon separating the warp ends of every intervening pair of warp wires so as to,

' raise one warp wire end and depress the other warp wire end of each intervening pair of warp wires, further separating further lifting the raised warp further depressing wire ends and the depressed warp'wire ends,

subsequently shearing across the raised warp' plane of the top surface of: theifabric and shearing acros'sjthe depressed warp wire ends in the wire-ends in the plane of the undersurface of the fabric to sever thewarp wire endsshprtly the warp wire ends by beyond where they cross the last remaining weft severing the warp wire ends shortly beyond where wire and thereby to leave downwardly sloping they cross the last remaining weft wire to leave ends of the fabric to be joined, opening out the warp wire end meeting a correspondingly uploose warp wire ends so that every third warp wardly sloped warp wire en wire end is bent downwardly and every pair of 9. The improved method of uniting the ends intervening warp wir nds is bent upwardly, 'of twill weave woven wire fabric which consists sever n t W p W e s r y beyond where in preparing each end of fabric by withdrawing they cross the last remaining weft wire to leave the first three end weft wires and removing the other end of fabric, finally uniting the abutting the area of the mesh openings being substanwarp wire ends by welding, brazing or soldering tially the same at the seam as in the body of maintain contmuity of the twill weave across 11. A seam for joining two sections of twill the seam when the Warp wire ends are finally weave woven wire fabric, said seam being formed united. by welding together the abutting raised ends of 8. The improved method of uniting the ends every third warp wire and welding together the of twill weave woven wire fabric which consists abutting sloping end portions of each intervenwire end isbent downwardly and every pair of FERDINAND STEINHART. 

